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/***************************************************************************************************
Zyan Disassembler Library (Zydis)
Original Author : Joel Hoener
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
***************************************************************************************************/
#include "zydis/Zydis/Disassembler.h"
#include "zydis/Zycore/LibC.h"
/* ============================================================================================== */
/* Internal helpers */
/* ============================================================================================== */
static ZyanStatus ZydisDisassemble(ZydisMachineMode machine_mode,
ZyanU64 runtime_address, const void* buffer, ZyanUSize length,
ZydisDisassembledInstruction *instruction, ZydisFormatterStyle style)
{
if (!buffer || !instruction)
{
return ZYAN_STATUS_INVALID_ARGUMENT;
}
*instruction = (ZydisDisassembledInstruction)
{
.runtime_address = runtime_address
};
// Derive the stack width from the address width.
ZydisStackWidth stack_width;
switch (machine_mode)
{
case ZYDIS_MACHINE_MODE_LONG_64:
stack_width = ZYDIS_STACK_WIDTH_64;
break;
case ZYDIS_MACHINE_MODE_LONG_COMPAT_32:
case ZYDIS_MACHINE_MODE_LEGACY_32:
stack_width = ZYDIS_STACK_WIDTH_32;
break;
case ZYDIS_MACHINE_MODE_LONG_COMPAT_16:
case ZYDIS_MACHINE_MODE_LEGACY_16:
case ZYDIS_MACHINE_MODE_REAL_16:
stack_width = ZYDIS_STACK_WIDTH_16;
break;
default:
return ZYAN_STATUS_INVALID_ARGUMENT;
}
ZydisDecoder decoder;
ZYAN_CHECK(ZydisDecoderInit(&decoder, machine_mode, stack_width));
ZydisDecoderContext ctx;
ZYAN_CHECK(ZydisDecoderDecodeInstruction(&decoder, &ctx, buffer, length, &instruction->info));
ZYAN_CHECK(ZydisDecoderDecodeOperands(&decoder, &ctx, &instruction->info,
instruction->operands, instruction->info.operand_count));
ZydisFormatter formatter;
ZYAN_CHECK(ZydisFormatterInit(&formatter, style));
ZYAN_CHECK(ZydisFormatterFormatInstruction(&formatter, &instruction->info,
instruction->operands, instruction->info.operand_count_visible, instruction->text,
sizeof(instruction->text), runtime_address, ZYAN_NULL));
return ZYAN_STATUS_SUCCESS;
}
/* ============================================================================================== */
/* Public functions */
/* ============================================================================================== */
ZyanStatus ZydisDisassembleIntel(ZydisMachineMode machine_mode,
ZyanU64 runtime_address, const void* buffer, ZyanUSize length,
ZydisDisassembledInstruction *instruction)
{
return ZydisDisassemble(machine_mode, runtime_address, buffer, length, instruction,
ZYDIS_FORMATTER_STYLE_INTEL);
}
ZyanStatus ZydisDisassembleATT(ZydisMachineMode machine_mode,
ZyanU64 runtime_address, const void* buffer, ZyanUSize length,
ZydisDisassembledInstruction *instruction)
{
return ZydisDisassemble(machine_mode, runtime_address, buffer, length, instruction,
ZYDIS_FORMATTER_STYLE_ATT);
}
/* ============================================================================================== */
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